摘要： 不变只是愿望，变化才是永恒--SWIFT普遍的做法是，选择一种方法，试试看；如果失败了，没关系，再试试别的。不管怎么样，重要的是先去尝试。-- 富兰克林 D. 罗斯福There is nothing in this world constant but inconstancy.-- SWIFTIt is common sense to take a method and try it. If it fails, admit it frankly and try another. But above all, try something.-- FRANKLIN D. ROOSEVELT系统软件开 阅读全文